I won DV Lottery for 2006.But for family reason I did not go to further process that time.I still have original documents which were sent to me by KCC.Is it possible to bring back that case?
No, you are no longer eligible to apply.
For more information, refer to the U.S. Dept of State website:
http://travel.state.gov/content/visas/english/immigrate/diversity-visa/entry.html